TL;DR: Under SOP 50 10 8, a seller note can only count toward your 10 percent equity injection if it is on full standby for the entire 10-year SBA term and covers no more than half the required injection. The 80/10/10 still works. It now demands a different kind of seller. Here is the conversation that separates the deals that close from the ones that fall apart at the bank.
There is no quiet way to say this. Most of the 80/10/10 deals being pitched right now will never close.
Not because the math is wrong. The math is fine. They will not close because the seller note inside them does not comply with SBA rules that have been in effect since June 2025, and somewhere between the LOI and the lender's desk, the deal will fall apart. The seller will balk. The buyer will scramble. The broker will go quiet. Three months of diligence gone, because nobody had the conversation that needed to happen on day one.
That conversation is short. It has three questions in it. And every buyer in the market needs to be the one asking them.
What the SBA Actually Changed
SOP 50 10 8 went live last June. Buried in the changes was a tightening on seller notes used as part of the buyer's equity injection. Two rules now apply. The note has to be on full standby for the entire term of the SBA loan, meaning no principal payments and no interest payments to the seller for the full 10 years. And the seller note can cover no more than 50 percent of the buyer's required 10 percent injection.
Translated to the 80/10/10: out of a buyer's 10 percent equity injection, at least 5 percent has to be unborrowed cash from your own funds. The seller note can cover the other 5 percent, but only if the seller agrees to receive zero payments on that note for 10 years.
Most listings and most brokers do not disclose this up front. They quote a deal that works at 10 percent buyer down with a seller note. They do not mention that the seller note has to sit silent for a decade. That conversation usually happens at the lender's desk, three weeks into due diligence, when it is too late to walk away cleanly. By then your name is on the LOI, your CPA is into your books, and the seller has stopped talking to other buyers. The leverage is gone, and the deal still needs to be rewritten.
Why This Is Good News for Serious Buyers
Here is the thing nobody mentions. The 10-year standby seller note is the cleanest test of seller motivation in any deal.
A seller who genuinely believes in the business will agree to it. They collect 95 percent of the proceeds at closing. They wait 10 years for the last 5 percent. That is a small price to pay if the business is what they say it is. A seller who refuses is telling you something specific. They want their money out and they do not want any future tie to the business. That is a posture, not a position.
I watched a buyer last summer lose two deals in a row because the sellers refused standby. The third seller agreed before the buyer finished the sentence. Same industry. Similar size. Different sellers. The third deal closed and is running at full Bulletproof scoring 18 months later. The first two would have been disasters. The 10-year standby filtered them out before the buyer signed anything.
After 35 years of looking at these, the sellers who refuse standby are almost always the ones who know something about the business they have not disclosed. The note is not the problem. It is the diagnostic.
A seller note on 10-year standby is the loudest reference check you can buy. It costs you nothing and tells you everything.
The Conversation That Saves You Three Months
Smart buyers now lead with the standby clause. They do not wait for the lender to surface it three weeks in. They put it in writing in the LOI.
The language is simple. The seller note will be on full standby for the entire term of the SBA loan, with no principal or interest payments during that period, after which the note may be repaid as a balloon or amortized over a separate schedule. That sentence does the work. If the seller balks at it, you have learned something important about the deal before you have spent a dollar on diligence.
Three questions in the first conversation with any seller. One: are you willing to carry 5 percent of the purchase price as a 10-year full-standby note. Two: are you willing to put that commitment in the LOI before diligence begins. Three: will you put us in front of your CPA and your attorney to confirm they understand the standby structure. A seller who answers yes to all three is a seller you can do business with. A seller who hesitates on any of the three is a seller you can save yourself months on. Banks will not catch this for you. Neither will the broker.
You can run the deal through the Bulletproof calculator at DealScore Pro to model what the new structure does to your numbers. The good news is that a full-standby seller note actually improves your DSCR in the early years, because you are not servicing that 5 percent. Your annual debt service stays lower for a decade. Your owner cash flow runs higher than it would have under the old structure. Your payback comes faster. The math still works. You just need a seller who will sit on the other side of the table long enough to make it work.
The Bulletproof method does not change because the SBA tightened a rule. The 80/10/10 is still the structure. The 3.0x multiple ceiling is still the discipline. The 2.0x stress DSCR is still the line. What changed is the test of the seller across from you, and that test is now built into federal rule. Use it.
If you want to see the full Bulletproof framework applied to the new rules, the free Masterclass below walks through the same criteria I use on every evaluation.
What This Means For You
If you are negotiating an acquisition in the next 90 days, put the 10-year standby clause in your LOI before you authorize diligence and watch how the seller responds.
— Mike
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